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readmps(1) Scilab Function readmps(1)
NAME
readmps - reads a file in MPS format
CALLING SEQUENCE
[m,n,nza,irobj,namec,nameb,namran,nambnd,name,stavar,rwstat,hdrwcd,lnkrw,hdclcd,lnkcl,rwnmbs,clpnts,acoeff,rhs,ranges,ubounds,lbounds] =readmps ('file-name',maxm,maxn,maxnza,big,dlobnd,dupbnd);
PARAMETERS
file-name : character string (Name of file 'file-name.mps')
maxn : integer number (Maximum number of constraints). maxn : integer
number (Maximum number of variables).
maxnza : integer number (Maximum number of nonzeros entries in the LP
constraint matrix).
big : large real number
dlobnd : real nymber (Default lower bound).
dupbnd : real number (Default upper bound).
m : integer number (Actual number of constraints+1).
n : integer number (Actual number of variables).
nza : integer number (Actual number of nonzeros entries in the LP
constraint matrix).
irobj : integer (Index of the objective row).
namec : character string (Name of the objective).
nameb : character string (Name of the right hand side).
namran : character string (Name of the ranges section).
nambnd : character string (Name of the bounds section).
name : character string (Name of the LP problem). stavar : integer
vector ( variable status see hopdm.sci).
rwstat : integer vector ( see hopdm.sci - rdmps1.f)
hdrwcd : real vector (Header to the linked list of rows with the same
codes).
lnkrw : integer vector (Linked list of rows with the same codes).
hdclcd : integer vector (Header to the linked list of columns with the
same codes).
lnkcl : integer vector (Linked list of columns with the same codes).
rwnmbs
: integer vector (Row numbers of nonzeros in columns of matrix A.)
clpnts : integer vector (Pointers to the beginning of columns of matrix
A).
acoeff : real vector (Array of nonzero elements for each column).
rhs :real vector ( Right hand side of the linear program).
ranges : real vector of constraint ranges.
ubounds : full column vector of upper bounds
lbounds : full column vector of lower bounds
DESCRIPTION
[m,n,nza,irobj,namec.nameb,namran,nambnd,name,stavar,rwstat,hdrwcd,lnkrw,hdclcd,rwnmbs,clpnts,acoeff,rhs,ranges,ubounds,lbounds]
= readmps ('file-name',maxm,maxn,maxnza,big,dlobnd,dupbnd). Utility func-
tion: reads file 'file-name.mps' in mps format. It is an interface with the
program rdmps1.f of hopdm (J. Gondzio). For a description of the vari-
ables, see the file rdmps1.f.
EXAMPLE
//File : test.mps (uncomment)
//NAME TESTPROB
//ROWS
// N COST
// L LIM1
// G LIM2
// E MYEQN
//COLUMNS
// XONE COST 1 LIM1 1
// XONE LIM2 1
// YTWO COST 4 LIM1 1
// YTWO MYEQN -1
// ZTHREE COST 9 LIM2 1
// ZTHREE MYEQN 1
//RHS
// RHS1 LIM1 5 LIM2 10
// RHS1 MYEQN 7
//BOUNDS
// UP BND1 XONE 4
// LO BND1 YTWO -1
// UP BND1 YTWO 1
//ENDATA
//// objective:
// min XONE + 4 YTWO + 9 ZTHREE
//// constraints:
// LIM1: XONE + YTWO < = 5
// LIM2: XONE + ZTHREE > = 10
// MYEQN: - YTWO + ZTHREE = 7
//// Bounds
// 0 < = XONE < = 4
// -1 < = YTWO < = 1
//// End
maxm = 5;
maxn = 4;
maxnza = 9;
big = 10^30;
dlobnd = 0;
dupbnd = 10^30;
//
//[m,n,nza,irobj,namec,nameb,namran,nambnd,name,stavar,rwstat,hdrwcd,...
//lnkrw,hdclcd,lnkcl,rwnmbs,clpnts,acoeff,rhs,ranges,ubounds,lbounds] = ...
//readmps ('test',maxm,maxn,maxnza,big,dlobnd,dupbnd);
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